Sir Rudolf Ernst Peierls | British Nuclear Physicist & WWII ...
WEBB1 juni 2024 · Sir Rudolf Ernst Peierls was a German-born British physicist who laid the theoretical foundations for the creation of the first atomic bomb. From 1925 to 1929 Peierls studied at universities in Berlin and Munich before working with
Ising model - Wikipedia
WEBBför 5 dagar sedan · The Ising model undergoes a phase transition between an ordered and a disordered phase in 2 dimensions or more. Namely, the system is disordered for small β, whereas for large β the system exhibits ferromagnetic order: This was first proven by Rudolf Peierls in 1936, [6] using what is now called a Peierls argument .
Understanding the magnetism-ductility trade-off in FeCoMn ...
WEBBför 2 dagar sedan · In the present work, the Peierls stress was calculated for all FeCoMn alloys, while the GSFEs were calculated for some FeCoMn alloys to compare with the Peierls stress and gain insights into the mechanism of ductility changes.
Spin-Peierls transition in the frustrated spinels ZnCr2O4 and ...
WEBB24 maj 2024 · Our simulations suggest that the tetragonal distortion might play a key role in the spin-Peierls mechanism. Indeed, both ZnCr 2 O 4 and MgCr 2 O 4 essentially remain magnetically disordered down to the necessary temperature for the tetragonal distortion to be able to bring a net magnetic energy gain [Fig. 3 (c,d)] that nucleates the ...
First proof of black hole ‘plunging regions'
WEBB16 maj 2024 · Rudolf Peierls Centre for Theoretical Physics 16 May 2024 Using X-ray data to test a key prediction of Einstein’s theory of gravity, their study, published today in the Monthly Notices of the Royal Astronomical Society , gives the first observational proof that a 'plunging-region' around black holes not only exists, but exerts some ...
WEBB24 maj 2024 · Our results are consistent with a spin-Peierls scenario where the cubic symmetry persists down to TN, where the structural transition into a lattice with lower symmetry is induced by a gain in magnetic exchange energy and accompanied by long-range magnetic order at the same temperature TN.
Phys. Rev. B 109, L180508 (2024) - Physical Review Journals
WEBB24 maj 2024 · On the opposite, for the other type of Peierls-like EPC coupling to electron hoppings on the nearest bonds, also called Su-Schrieffer-Heeger phonon, α is positive, grows with decreasing T c, and tends to diverge as T c → 0
Discovery of charge order above room-temperature in the ...
WEBBför 2 dagar sedan · Before concluding, we clarify our use of the term ‘charge order’, initially defined to describe Peierls-type instabilities 64 characterized by periodic charge density fluctuations without ...
The Peierls argument: how percolation theory started (Mika ...
WEBB13 maj 2024 · Abstract: “The Peierls argument is an energy-entropy argument proving the existence of a phase transition in the Ising model in 2 dimensions. It is very simple to understand but has lead to the development of the field of percolation
Astronomy and astrophysics | University of Oxford Department ...
WEBB30 maj 2024 · Working closely with the Astrophysics sub-department, members of our Rudolf Peierls Centre for Theoretical Physics conduct world-leading research into galactic dynamics and kinetic theory of self-gravitating systems, gravitational-wave astrophysics and black-hole physics, planetary dynamics and accretion discs, and astrophysical ...
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